Clyde King's two HO scale gondolas pictured below come from Southern Pacific's G-100-26 class. The models are based on SP 338169 that we photographed and measured at Lathrop, CA in March 2006. Okay, so he's taken a while getting around to this project. ;-P Although Walthers does offer a ready-to-run model you can use for these gons, Clyde's is significantly better all-around.

You'll find prototype G-100-26 images in my walk-around gallery here
https://pbase.com/espeef5/sp_g_100_26

More info and prototype pix found here
http://www.railgoat.railfan.net/spcars/byclass/gon/g100-26.htm